Improvement in paper-cutting machines



- 2 Sheets-Sheet 1.

figtented Feb. 18,1879.

J. M. JONES. Paper-Cutting Machine.

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[M'UWT ma $0M N-FETERS. PHOTO-LITHOGRAPHER, WASHINGTON. D. C.

2 Sheets-Sheet 2 J. M. JONES. Paper-Cutting Machine.

Pa tented Feb. 18; 1879.

UNITED STATES PATENT OFFICE.

JOHN M. JONES, OF PALMYRA, NEW YORK.

IMPROVEMENT lN PAPER-CUTTING MACHINES.

Specification forming part of Letters Patent No. 212,384, dated February 18, 1879 application filed March 26, 1878.

To all whom it may concern:

Be it known that I, JOHN M. J mess, of Palmyra, New York, have invented certain Improvements in Machines for Cutting Paper, of which the following is a specification: V

My invention relates to that class of papercutting machines-in which the material to be operated upon is clamped upon a table underneatha reciprocating knife; and it consists in a new method of controlling the extent of the travel of the knife by means of an adjustable pin, which may be placed in any one of a number of holes made in the rod passing through the spiral spring which supports the knife, and operating in connection with a pivoted link to limit the action of the spring, and in a central vertical guide-piece for preventing the binding of the paper-clamp at either end.

It also consists in the combination of a shearnut with the screw which adjusts the papergage, in such manner that the position of the gage with reference to the knife may be readily changed by a hand-lever connected with the nut, and in the combination of a spring-clamp with the gage-adjusting screw, to secure the same 1n any given position.

In the accompanying drawings, Figure 1 is an end elevation of a paper-cutting machine embodying my invention. Fig. 2 is an end elevation of the paper-clamp. Fig. 3 is alongitudinal section of my improved paper-cutter and Fig. 4. shows the under side of the table and the arrangement of the adjusting-screw, shear-nut, and hand-lever.

In the accompanying drawings, A A are the side frames of the machine, and B is the table upon which the paper is placed. The side frames A extend upward above the table at each side thereof, and form guides or ways, as shown at C 0, between which the knifestock F reciprocates.

The side frames G O are connected together at their upper ends by a suitable head-block, E, which extends across the machine, and carries the clamp-screw a in a suitable journal, and receives the pivots on which the upper ends of the knife-supporting links I) 1) swing, the lower ends of which pass into and are pivoted in mortises cast in the knife-stock F. The links I) 11 being pivoted to the head-block the machine, and turns upward in a curved arm provided with teeth on its upper edge, as shown in Fig. 1. A segmental pinion, G, provided with a hand-lever, c, for operating the knife, meshes in the teeth of the rack on the projecting arm of the knife-stock. The reciprocating oblique motion is given to the knifestock by means of the hand-lever c. The pinion G is carried between two projecting pieces, 0, cast with the frames. The upward motion of the knife is obtained by means of a spiral sprin g, f, 'Fi g. 1. As the knife descends obliquely across the machine, it compresses the spiral spring f against the bent end of the link i (which is pivoted to the head-block E at t, Fig. 1) by means of the rod it, placed within the spring, which rod is pivoted into a lug, g, cast on the knife stock. By inserting a pin in any one of the several holes in the rod it between the link i and the lug g, the expansion of the spring, and consequently the vertical travel of the knife, may be limited.

A sliding collar, made adjustable on the red It by means of a setscrew, may be substituted for the pin and holes in the rod h.

The clamping-bar H, Figs. 2 and 3, slides vertically between the slide frames 0 O, and is pressed down upon the paper to secure it in place by means of the screw aand hand-wheel I.

In order to prevent the clamping-bar H from binding in its guides in the frames 0 G, a guidetongue, J, is cast on the head-block E, and is accurately fitted into a recess formed in the side of the clamping-bar. This guide-tongue is located centrally, and insures the vertical descent of the clamping-bar wherever the paper located underneath it may be placed.

A gage, L, is arranged to slide backward and forward on the table, to and from the knife.

The gage L is connected with the screw M, located underneath the table, by a pair of I i v jaws, k k, Figs. 3 and 4, which pass through a slot in the table and a half-nut, O.

The nut O is attached to a short arm, which is pivoted between the jaws 7c 70, and is controlled by a hand-lever, N. By means of this lever, which extends under the table to the end of the machine where the operator stands while adjusting the paper, the nut O is disconnected from the screw M, and the gage L can then be quickly shifted from one position to another.

The screw M is used for slight adjustments of the paper-gage; but when it becomes necessary to shift its position for some distance the screw alone is too slow; but by elevating the handle N the operator is enabled to disconnect the nut 0 from the screw and to slide the paper-gage at once to any desired position.

The outer end of the screw M is provided with a smooth-edged wheel, P, against which a clamp, l, is arranged to operate by means of the spring 1.

The clamp l is carried by a shaft, 8, Fig. 4, arranged to turn in journals underneath the table, and provided with auarm, q.

A spring, 1", operating against the outer end of the arm q, secures the clamp lin position against the wheel P, as indicated by dotted lines in Fig. l, or away from it, against the stop u, Figs. 1 and 4, which prevents the arm g from throwing over too far beyond the line joining the center of the shaft 8 and the point on the frame where the spring 1' and its supporting-rod bear.

A handle, 11, serves to operate the clamp l, and when the clamp is pressed against the wheel 1? the screw M is prevented from rotat- 1n g.

I claim- 1. The combination of the reciprocatingknife and knife-stock with the spring f, link i, pivoted to the head-block E, rod h, and means, substantially as described, for adjusting the travel of the said spring and knife, substantially as set forth.

2. The combination, in a paper-cutting machine, of a reciprocating knife, a paper-supporting table, gage L, screw M, nut O, and lever N, operating substantially as set forth.

3. The combination of areciprocating knife, paper-gage L, screw M, wheel P, clamp I, rockshaft 3, and spring 7', substantially as set forth.

JOHN M. JONES.

Vitnesses:

H. P. KNOWLES, JAS. BoURNE, Jr. 

